Improvement in stop-motion for looms



,waited gister @stent @twine Letters Patent No. 90,627, dated June 1,1869.

IMPROVEMENT IN STOP-MOTION FOR LOKQMS.

The Schedule referred to in these LettersPatent and making part of thesama.

To all whom. Iit may concern:

Be it known that I, A. A. BARKER, of Lewiston, in the county ofAndroscoggin, and State of' Maine, have invented a new and useful[Improvement in Looms;'a.nd I hereby declare t-he following to be afull, clear, and exact description thereof, which will enable others tomake and use my invention, reference being had to the accompanyingdrawings, forming part of this specitication, in which- Figure l is a.View of the interior of one side of the loom, next to the stop-motion.

Figure 2 is a side elevation of my invention, showing the pattern-chain,stop-motion, Sac.

Figure 3 is a front end elevation.

A is a side view in detail of the stop-motion.

B is a top plan of same.

As looms are now usually constructed, when the fillfing 'runs out, thestop-motion used stops the loom, but the momentum ofthe machinerysprings the shed three or four times, and operates, for about the samenumber of times, the pattern-chain and box-motion. By this continuedmotion, the shuttles are changed, and frequently a thread or threads ofanother color woven in before their turn. This necessitates the pickingout of the wrong thread or threads, and setting back the pattern-chainand box-motion to the exact point at which they were when the fillingrun out.

Any error in the setting back causes a break in the weit-pattern.

To avoid accidents of this kind, and the loss of time required tocorrect them, the weaver is obliged to watch his loom very carefully,and replace the shuttles as soon as they7` are empty, which occurs aboutonce in three-quarters of a minute. But on an average, with an vordinaryweaver, this accident will occur about once in ve shuttles, and, with anintricate pattern, from five to eight minutes are required to set theloom in motion again.

It has long been desirable to obtain some device which will stop thebox-motion and pattern-chain as soon as the iilling runs out, as itwould enable a weaver to take charge of' more looms, and consequentlydoV his work more cheaply, The quality would also be improved, as itwould lessen the liabilityy of breaks occurring in the pattern, whichdetract' from the value ofthe fabric.

Toobviate this diliculty is the object of my invention, and by referenceto the accompanying drawings its details will be understood.

Fig. 1 shows an inside view ofthe loom.

.The stop-motion is seen at a, iig. 1, with the tongue d dropped andcaught by the lever 1).

b is operated by the cam c on the main shaft of the loom.

As long as the thread remains in the shuttle, the tongue d is thrown upby it, as seen in dotted lines at A, but when it runs out, it is caughtby b, as seen ,in fig. 1, and the stop-motion pushed outward by it, asshown.

B shows a top view of the stop-motion, the portion marked 1 being thebed of thc same, and 2 being the slide moving in it, operated by b inthe manner de- Aates to raise the dog, which gives movement to theclmin-motion. s

This dog is seen at f, and is operated by the grooved eccentric g onl.the main shaft. The wire e raises it, and detaches it from the ratcheth of the pattern-chain.

At the same time it presses inwardly ythe wire t', pivvoted at The endof this wire is passed through the loop l, fig. 2, in the lever m,drawing it out from the patternchain.

To this lever m is attached the wire n, connecting with the right-angledlever a at its lower end p.

The, upper end y 0l this lever has a wire, q, attached to it, the lowerextremity of which is fastened to the dog Ir, which operatesV the box orshuttlemotion by means of the' ratchet s, seen in dotted lines.

The lever working the shuttles is indicated at t.

-u is the cam giving it motion.

fc is the reed through which the web passes.

w shows the lever moved by the cam :t on the main shaft, which gives tothe pawl r its motion.

Vhile the thread remains in the shuttle as it passes 1 through the shed,it strikes the tongue of the stopmotiou, and throws it up, as seen indotted lines at A, so that it does not' engage the lever b, but when thefilling runs out, the tongue is caught by its lip by b, thc slide ispushed forward, pressing outward the wire c, which both raises the dog,or pawl f from the ratchet h of the chain-motion, stopping that, and atthe same time forcing the wire Ai inward, turning out its end k, and thelever lnt connected with it, and drawing with it the wire-n and end p ofthe right` angled lever o, and raising the end y, wire q, and dog,

Wlnit I claim as my invention, and desire to secure by Letters Patent,is-

The eombinntion, with the weft-fork, pattern-cylinder, and shuttle-boxoperating-cum, ofthe rods 6,1', 12, and q; and levers o m, for stoppingthe pattern-oylin .der and shuttle-box cam when the weft fails,substantially as described.

Witnesses:

F. 0. SANDS7` B. S. BARR.

A. A. BBKER.

